http://www.ign.com/videos/2011/08/26/halo-anniversary-single-player-walkthrough
Including classic mode is an excellent idea; it really lets you see the incredible difference at a glance. Remember that 10 years ago, Halo was considered one of the industry's graphical pioneers. Pretty good progress!
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Yoblazer: http://oi52.tinypic.com/ad21i1.jpg
Watch and you'll see... someday I'll be... part of your world!